The word radiosensitivity cannot be made in Words With Friends™. It is 16 letters long, too long to fit on a WordsWithFriends board (15 letters max).
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (245 words)
adonise, advents, adverts, adviser, advises, advisor, airiest, airside, aneroid, anodise, antsier, aridest, aridity, artiest, artists, astride, astroid, atoners, attends, attired, attires, avidest, avidity, avoider, dairies, daisies, denarii, density, dentist, destain, destiny, destroy, detains, detorts, detrain, deviant, devisor, diaries, diarist, dietary, dietist, diorite, dirties, disrate, dissent, distant, distort, ditsier, ditties, dittoes, diverts, divests, diviner, divines, divisor, donairs, donates, dossier, dotiest, dotters, dottier, doviest, drivein, dryness, edition, editors, evasion, inditer, indites, indorse, inertia, inosite, inroads, inserts, insider, insides, instars, instate, instead, intorts, invader, invades, inverts, invests, invited, inviter, invites, invitro, iodines, iodiser, iodises, iodites, ionised, ioniser, ionises, iratest, iridise, irisate, ironies, ivories, ivorist, naivest, naivety, nastier, natives, natters, nattier, nitrate, nitride, nitrite, nittier, noisier, norites, nosiest, notated, notists, ordains, orients, otarine, ovaries, ovendry, oversat, oversit, oysters, raisins, rations, rattons, ravines, reasons, resands, restain, retains, retinas, retints, retoast, revisit, roadies, roasted, rodents, roisted, rosiest, rosined, rotated, rotates, sainted, sanders, sandier, sardine, satiety, satires, saviors, savored, seitans, senator, seniors, sensory, servant, sestina, sinoids, sinters, sitters, snidest, snorted, snotted, snotter, sortied, sorties, stained, stainer, stander, started, starved, starves, staters, statins, station, stative, stayers, steroid, stetson, stinted, stivers, stivier, stoners, stonier, storeys, storied, stories, strains, straint, straits, strands, strayed, striate, strides, strived, striven, strives, synovia, tainted, taoists, tasters, tastier, taverns, tensors, tidiers, tidiest, tierods, tinders, tindery, tiniest, tinters, tintier, tirades, toasted, toaster, tradein, trained, transit, treason, trident, trinity, triones, trivets, triynes, trysted, tsarist, tyrants, vainest, variety, varsity, vastest, vendors, verists, veritas, version, virions, viroids, visions, visited, visitor, vitiate, vitrine, voiders, yttrias